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我有一点你好，世界我希望使用CMake以更加端到端的方式工作的样式程序。在这种情况下，这意味着我可以下载Boost库，编译它们，最后编译我的小小的Hello，World并将Boost库链接到它。HelloWorld：使用CMake下载，建立和链接Boost
的目录布局看起来像这样目前
cmaketest
|- build //I would like to have here the CMake generated IDE files.
|- src
|- main.cpp
|- hello.cpp
|- hello.hpp
|- depends //I would like to have here the built Boost libraries and headers.
|- downloads //This contains the downloaded zip file.
|- temp //Temporary files.
我有以下CMakeLists.txt，目前我生成在Visual Studio 2015年项目文件，如下所示：cmake build -G "Visual Studio 14 2015 Win64"。一切顺利，我将开始解决方案，CMake抱怨它无法找到Boost，去下载它开始建立（在下面的代码中，我已经设置为获取先前获取的文件）。但之后，建设一段时间后，问题出现...
- Boost文件似乎出现在
\cmaketest\CMakeFiles\build\Boost-prefix\src\Boost作为根。我怎么能这些，所以他们会被建立到\depends\boost（或为此），以及如何将库链接到解决方案？这个链接是一个单独的问题，我知道如何从这个奇怪的目录中包含头文件，但这不是我想要的。 - 它看起来像VS IDE第一次警告Boost标题不会被发现（见主程序很快），然后启动Boost构建。这可以避免吗？
- 如何使Boost库从VS解决方案中消失？即不是为了制作它的项目，而只是依赖头文件和库？
- 如果Boost软件包已经在磁盘上，是否有内置的方法来避免下载？它看起来会在任何情况下被检索到，并且我想过检查文件的存在。
的main.cpp（我想这是在这种情况下，相关的文件）
//The Boost headers are included just to check the linker.
#include "hello.hpp"
#include <boost/date_time/posix_time/posix_time.hpp>
#include <boost/date_time/posix_time/posix_time_io.hpp>
#include <iostream>
using std::cout;
using std::endl;
int main()
{
hello helloer;
cout << helloer.greet("World here") << endl;
return EXIT_SUCCESS;
}
然后是CMakeLists.txt文件。
cmake_minimum_required(VERSION 3.6 FATAL_ERROR)
set(CMAKE_VERBOSE_MAKEFILE ON)
project(Cmaketest)
if(POLICY CMP0042)
cmake_policy(SET CMP0042 NEW)
endif()
if(POLICY CMP0066)
cmake_policy(SET CMP0066 NEW)
endif()
# Default build type if none was specified.
if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
set(CMAKE_BUILD_TYPE Debug CACHE STRING "Choose the type of build." FORCE)
message(STATUS "Setting build type to '${CMAKE_BUILD_TYPE} as none was specified.")
# Possible values of build type for CMake GUI.
set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release" "MinSizeRel" "RelWithDebInfo")
endif()
# The path to extra modules.
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
# Setup build locations.
if(NOT CMAKE_RUNTIME_OUTPUT_DIRECTORY)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
endif()
set(CMAKE_CURRENT_BINARY_DIR
${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/build)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
include(ExternalProject)
include(ProcessorCount)
ProcessorCount(N)
if(NOT N EQUAL 0)
set(CMAKE_BUILD_FLAGS -j${N})
endif()
# set(BOOST_VERSION 1.63.0)
# Boost related settings:
# https://cmake.org/cmake/help/v3.6/module/FindBoost.html.
# Should one check the environment variables and flags here explicitly
# to remove the complaint about missing Boost library? Or should perhaps
# BOOST_ROOT be set? Point to what?
find_package(Boost)
if(NOT Boost_FOUND)
# It shouldn't hurt to enable extensive diagnostics, just in case.
# Also, a different set of files is downloaded for UNIX and WIN32
# due to file permissions and line-feeds (Windows should handle
# also Unix style line-feeds).
set(Boost_DETAILED_FAILURE_MSG on)
add_definitions(${Boost_LIB_DIAGNOSTIC_DEFINITIONS})
set(Boost_Bootstrap_Command)
if(UNIX)
set(Boost_Url "http://sourceforge.net/projects/boost/files/boost/1.63.0/boost_1_63_0.tar.gz")
set(Boost_Sha1 "2cecf1848a813de55e5770f324f084c568abca0a")
set(Boost_Bootstrap_Command ./bootstrap.sh)
set(Boost_b2_Command ./b2)
elseif(WIN32)
set(Boost_Url "http://sourceforge.net/projects/boost/files/boost/1.63.0/boost_1_63_0.zip")
set(Boost_Sha1 "4364989afbe6b11f2d5e59df902c3ca4d7851824")
set(Boost_Bootstrap_Command bootstrap.bat)
set(Boost_b2_Command b2.exe)
endif()
set(Config_Libraries "chrono,filesystem,program_options,system,thread,test")
ExternalProject_Add(Boost
TMP_DIR "${CMAKE_CURRENT_SOURCE_DIR}/temp"
DOWNLOAD_DIR "${CMAKE_CURRENT_SOURCE_DIR}/downloads"
URL "${CMAKE_CURRENT_SOURCE_DIR}/downloads/boost_1_63_0.zip"
URL_HASH "SHA1=${Boost_Sha1}"
BUILD_IN_SOURCE 1
UPDATE_COMMAND ""
PATCH_COMMAND ""
CONFIGURE_COMMAND ${Boost_Bootstrap_Command} --without-icu --with_libraries=${Config_Libraries}
BUILD_COMMAND ${Boost_b2_Command}
# --prefix="${CMAKE_CURRENT_SOURCE_DIR}/depends"
--without-python
--address-model=64
--architecture=x64
--threading=multi
--link=static
--variant=release
--layout=tagged
--build-type=complete
-j${N}
INSTALL_COMMAND ""
# INSTALL_DIR "${CMAKE_CURRENT_SOURCE_DIR}/depends"
#As it happens, these directories are currently empty...
# set(BOOST_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/depends/include/boost-1_63)
# set(Boost_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/depends/boost_1_63/include)
# set(Boost_LIBRARY ${CMAKE_CURRENT_SOURCE_DIR}/depends/boost_1_63/lib)
)
endif()
set(Boost_USE_STATIC_LIBS OFF)
set(Boost_USE_MULTITHREADED ON)
set(Boost_USE_STATIC_RUNTIME OFF)
include_directories(${CMAKE_SOURCE_DIR}/src)
# Grabbing just all the test project files.
file(GLOB SOURCES "src/*.*")
add_executable(cmaketest ${SOURCES})
# TARGET_LINK_LIBRARIES(cmaketest ${Boost_LIBRARY})
您的意图和目标是从源代码构建Boost还是仅仅想在您的应用中使用Boost，而您的应用是使用CMake构建的？在后一种情况下，我建议下载预先构建的Boost例如从这里https://sourceforge.net/projects/boost/files/boost-binaries/1.63.0/然后在你的CMake中使用find_package（Boost 1.63 REQUIRED），这将设置变量（参见FindBoost模块文档）增强库和标题。在你可能需要通过在你的CMakeLists.txt文件中提供BOOST_ROOT变量来帮助FindBoost find_package（） –
我想从源代码构建它来学习如何在Boost的上下文中做到这一点。接下来的事情就是从* vspkg *，* Nuget *，* Conan *或者其他的那些中获取二进制依赖关系。我也试探了一下。无论如何，我有这个目前我想解决的问题。 @fedepad写了些什么有助于看到我的方式的错误，但还有一段路要走。我相信我稍后（在手机上）更新这个问题到最新的尝试。 – Veksi
@ivan_onys我也可以想象如何决定如何根据构建包含调试和发布二进制文件。但也许在以后的时间。 :) – Veksi